mobility scooters

For battery charging my suggestion is, that you put the scooter to charge every night as well to ensure that you are fully charged every morning.

The above also depends on various factors for example body weight, incline and decline of terrain, the climate, frequency of use. 

If you are renting a collapsible scooter, as they do not have a very large range, when you stop over at a restaurant for lunch, perhaps you can just take the battery kit in with you and ask if you plug it in to recharge

The large size scooter (50amp) maximum user weight 20 stone, and has a minimum range of about 10 km and up to maximum of 20 km.